Revolving chair.



No. 825,822. 2 2 PATENTED JULY 10, 1906. J. GILSON, JR.

REVOLVING CHAIR.

APPLICATION FILED DEG. 29, 1904.

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No. 825,822. PATENTED JULY 10, 1906. J. GILSON, JR. REVOLVING CHAIR.

APPLICATION FILED DEG. 29, 1904.

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UNITED STATES PATENT OFFICE.

JOHN GILSON, J R., OF PORT WASHINGTON, W ISOONSIN, ASSIGNOR TO GILSON MANUFACTURING COMPANY, OF PORT WASHINGTON, WIS- CONSIN, A CORPORATION OF VVISOONSIN.

REVOLVING CHAIR.

latented July 10, 1906.

Application filed. December 29, 1904. Serial No. 238.770.

T 0 all whom it may (JON/(3677b;

Be it known that 1, JOHN GILsON, Jr., a citizen of the United States, residing at Port Washington, in the county of Ozaukee and State of WVisconsin, have invented a Vertical Adjustment for Revolving Chairs, of which the following is a specification.

This invention relates to improvements in vertical adjustments for revolving chairs; and the objects and advantages of the same, together with the novel features thereof, will hereinafter appear and be particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a perspective view of a vertical adjustment embodying my improvements. Fig. 2 is a vertical sectional view of the same, the parts being in the position occupied by them whereby the post is swiveled and therefore non-adjustable. Fig. 3 is a similar view, the parts being shown in position whereby the post for supporting the chair is rendered adjustable. Fig. 4 is a plan view in detail of the socket-casting. Fig. 5 is a detail in bottom perspective of the shifting ring. Fig. 6 is a similar view of the threaded nut. Fig. 7 is a top perspective of the bearing-ring.

Like numerals of reference indicate like parts throughout the drawings.

It will of course be understoood at the outset that my improved adjustment, for revolving chairs may be employed in connection with any desired form or style of chairspider, and while preferring that illustrated in the drawings, and which forms the subjectmatter of a companion application, (Serial No. 217,730, filed July 22, 1904,) yet I do not limit the application of the present invention to this form of spider.

In practicing my invention the socket 1, which is formed of cast metal, comprises the usual casting 2, recessed at its sides, as at 3, for the reception of the chair-legs and provided with screw-holes 4, through which screws may be passed into said legs. The socket-casting is bored centrally throughout its length, as at 5, and at its upper end is formed with a depressed annular track or recess 6. At intervals around the track notches 7 are formed, the same having one Seated in the annular depression 6 is abearing-ring 10, the upper edge of which is provided with shallow notches 11. The ring extends above the upper face of the socket-casting, and formed on the interior of said ring is a vertical rib 12, designed to fit a corresponding vertical groove 13, formed longitudinally in the threaded post 14.

Above the ring 10 and loosely encircling the post 14 is the shifting ring 15, and the same may be provided at opposite sides with projections 16, by which said ring may be conveniently manipulated by hand. This shifting ring is provided upon its upper side with portions of an annular flange 17 and upon its under side with inclined lugs 18, agreeing in proportion and location with the inclined notches 7, so that the shifting ring may be rota-ted, whereby its lugs may engage said notches and the ring become seated flatly upon the upper face of the socket-casting 2, or said ring may be rotated so as to withdraw its lugs from said notches 7 and by .said lugs be supported slightly above the face of said socket-casting.

Above the shifting ring is located the threaded nut 19, the same receiving the threads of the post 14. This nut has formed on its under side shallow lugs 20, and surrounding a central hub 21 may be formed a series of stop-lugs 22, which when the nut is raised, as will hereinafter appear, will be in position to become engaged by the lockingscrew 9 and when lowered will be below such locking-screw. As shown, the nut rests upon the shifting ring, and its lugs 20 normally engage with the shallow recesses 1 1 of the ring 10.

It will be obvious that taking the parts in the position shown in Fig. 2, wherein the shifting ring has its lugs 18 in engagement with the notches 7 of the socket-casting, and therefore has lowered the nut 19 so that its lugs 20 engage with the ring 10, the post 14 becomes swiveled within the socket-casting, and that in turning the nut and its bearingring 10 the post will be rotated upon the track 6 of the socket-casting. When, however, it is desired to adjust the chair to a different elevation, the shifting ring is partly rotated so that its lugs 18 leave the notches 7 of the socketcasting, and therefore support the nut above and out of engagement with the ring 10. This brings the lugs 22 into the plane of the locking-screw 9, so that the nut is prevented from rotating, and hence a rotation of the chair and its supporting-post 14 will cause the threads of the latter to be fed upward or downward within the nut, and consequently the chair raised or lowered.

It will be observed that I have devised a most efficient device for giving vertical adjustment to chairs and that the same comprises but very few parts and those of a substantial character, and, furthermore, that by removing the locking-screw 9 the post 14, together with the nut, bearing-ring, and shifting ring, may be removed from the socket for the purpose of inspection and repair.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a vertical adjustment for chairs, with a bored socket-castin having an annular bearing at its upper end and notches surrounding the same, a bearingring seated in the bearing and provided with notches in its upper side, a shifting ring surrounding the bearing-ring and provided with teeth on its under side engaging the notches in the socket-casting, a threaded nut mounted upon the shifting ring and having lugs depending within the same and adapted when said shifting ring is lowered to engage the notches in the bearing-ring, of a threaded post mounted in the nut, stop-lugs formed on the upper side of the nut, a standard rising from the casting, and a screw mounted in the standard and extending inwardly into the path of the nut when the latter is raised by the shifting ring.

2. The combination, of a bored socketcasting provided on its upper side with inclined notches and with an annular bearing, a bearing-ring mounted for rotation in the bearing and provided on its upper side with notches, a shifting ring encircling the bearing-ring and having inclined lugs for engaging the notches of the casting and being further provided with radial projections and upon its upper side with annular projections or flanges, a threaded nut mounted within the annular flanges and provided upon its under side w th lugs for engaging the notches of the bearing-ring and upon its upper side with stop-lugs, a post rising from the casting, a projection extending inwardly from the post and adapted to engage the stop-lugs when said nut is elevated by a partial rotation of the shifting ring, whereby the lugs of the latter are withdrawn from the notches of the casting, and an adjusting-post threaded in said nut.

3. The combination, of a bored socketcasting, a notched bearing-ring seated therein, a nut above the bearing-ring and adapted to engage and move therewith, means independently rotatable of and adapted for elevating the nut out of engagement with the bearing-ring, means for locking said nut a ainst rotation when so elevated, and an a justing-post mounted in the nut.

4. The combination, of a bored socketcasting having a bearing at its upper end, a ring having notches in its upper face and mounted in said bearing, a threaded nut above the ring and provided with lugs for en gaging the same, a shifting ring encircling the bearing-ring and supporting the nut and adapted to be raised and lowered whereby the nut may be raised out of engagement with the bearing-ring, a stop for locking and preventing the rotation of the nut when said nut is raised out of engagement with the bearing-ring, and a threaded post located in v the nut.

5. The combination, of the bored socketcasting having the annular bearing-recess in its upper end and the surrounding inclined notches, the bearing-ring seated for rotation in the recess and having in its upper side the shallow notches and the internal rib, the

shifting ring having radial arms, the inclined lugs upon its under side and the annular flanges upon its upper side, the threaded nut having lugs on its under side designed to engage the notches of the bearing-ring and further provided with the radial lugs upon its upper side, the threaded post arranged in the nut and longitudinally grooved to receive the rib of the ring, the post rising from the socketcasting, and the screw threaded in the post and adapted to engage the stop-lugs of the nut when the lugs of the ring are out of engagement with the socket-casting.

6. The combination, of a bored socketcasting, a bearing-ring seated therein, a nut above the bearing-ring and adapted to engage and move therewith, means independently rotatable of and adapted for throwing the nut out of engagement with the bearingring, means for locking said nut against rotation when thrown out of engagement, and an adjusting-post mounted in the nut.

7. The combination, of a bored socketcasting, a rotatable bearing therein, anadjustable post slidably mounted in the bearing and adapted to rotate therewith, a nut above said bearing adapted for removable engagement therewith, means independent of the rotatable bearing for raising and lowerin' the nut out of and into such engagement and for supporting the nut when raised, and a stop projecting from the casting and adapted to engage and arrest the rotation of the nut when the latter is elevated.

8. The combination, of a bored socketcasting, a rotatable bearing therein, an adjustable post slidably mounted in the bearing and adapted to rotate therewith, a nut above said bearing adapted for removable engagement therewith, means independent of the rotatable bearing for raising and lowering the nut out of and into such engagecastin ment and for S11 porting the nut when raised, and means for l ocking the nut against rotation when said nut is so elevated.

9. The combination, of a bored socketa rotatable bearing therein, an adjustable post slidably mounted inthe bearing and adapted to rotate therewith, a nut above the bearing and mounted upon the post a shifting ring mounted upon the casting and adapted to support the nut out of en agement with the bearing, and means for locking the nut when raised and supported so by the shifting ring.

10. The combination, of abored socketoasting, a rotatable bearing therein, an adjustable post slidably mounted in the bearing and adapted to rotate therewith, a nut above said bearing and adapted for removable engagement therewith, means for raismg and lowering the nut bodily and without rotation out of and into engagement with the bearing and for supporting the nut when so raised above and out of contact with the bearing, and means for'seouring the nut against rotation when so raised and supported.

In testimony whereof I. have signed my name to this specification in the presence of two subscrib ng witnesses.

JOHN GILSON, JR.

Witnesses:

EDWARD BARELMAN, AUGUST BOERGER. 

